User interface for [detail] reference from {main]: prevent 'add' button

[giluka]

Hi all,
i've a main table with a mapping of a detail table ...

@ManyToOne(fetch=FetchType.LAZY, optional=false)
@JoinColumn(name="id_detail")
private Detail detail;

When i go in new or edit mode of a row of <main> how can i prevent possibility of add a new item detail ??
I want only to choose one detail item from a list ...

Thanks !

[giluka]

i've resolved ... simply insert:

@NoCreate @NoModify
@ManyToOne(fetch=FetchType.LAZY, optional=false)
@JoinColumn(name="id_detail")
private Detail detail;